Meanwhile, I have a new computer/OS (Mac Studio/M1 Max/Ventura) and the new version 2 of Affinity programs AND ... the same disaster.
When I export the slices and the the dialog window for selecting the output folder appears and I want to choose a folder the program crashes, taaraaaa!!!
There is a possibility that works sometimes. I open the file instead of Designer2 in Photo2 and export the files.
And what's worse, sometimes it works and sometimes it doesn't, I can't reproduce it as suggested.
However, it already seems to be related to the complexity of the document.
Please solve the problem, I don't want to go back to Adobe! 😝